Brazil City ‘Might Have Reached Herd Immunity’

In Brazil’s coronavirus-ravaged north, up to 66 per cent of people living in Manaus have contracted COVID-19, according to new research that aims to shed light on herd immunity.

Manaus, the capital of Amazonas state, has recorded about 51,000 cases of COVID-19 and more than 2,500 deaths from its population of less than two...